X = eval(input().strip())

if X < 600:
    print(8)
elif X < 800:
    print(7)
elif X < 1000:
    print(6)
elif X < 1200:
    print(5)
elif X < 1400:
    print(4)
elif X < 1600:
    print(3)
elif X < 1800:
    print(2)
elif X < 2000:
    print(1) X = eval(input().strip()) X eval(input().strip()) eval input().strip() ().strip () input strip if X < 600:
    print(8)
elif X < 800:
    print(7)
elif X < 1000:
    print(6)
elif X < 1200:
    print(5)
elif X < 1400:
    print(4)
elif X < 1600:
    print(3)
elif X < 1800:
    print(2)
elif X < 2000:
    print(1) X < 600 X 600 print(8) print 8 elif X < 800:
    print(7) X < 800 X 800 print(7) print 7 elif X < 1000:
    print(6) X < 1000 X 1000 print(6) print 6 elif X < 1200:
    print(5) X < 1200 X 1200 print(5) print 5 elif X < 1400:
    print(4) X < 1400 X 1400 print(4) print 4 elif X < 1600:
    print(3) X < 1600 X 1600 print(3) print 3 elif X < 1800:
    print(2) X < 1800 X 1800 print(2) print 2 elif X < 2000:
    print(1) X < 2000 X 2000 print(1) print 1 X = eval(input().strip()) eval(input().strip()) X
X = eval(input().strip())

if X < 600:
    print(8)
elif X < 800:
    print(7)
elif X < 1000:
    print(6)
elif X < 1200:
    print(5)
elif X < 1400:
    print(4)
elif X < 1600:
    print(3)
elif X < 1800:
    print(2)
elif X < 2000:
    print(1)
